Glassine lined oil container



Aug 24, 1965 B. R. wHALr-:Y ETAL GLASSINE LINED OIL CONTAINER Filed Jan.2, 1965 INVENTOR.

United States Patent (Mice 3,2%?,334 Patented Aug. 2d, 1955 3,262,334GLA'SSNE LI'NED (BEL CUNTAINER Baynard R. Whaley, Charles K. Dunlap,Jr., and Richard W. Turnage, Hartsville, SC., assignors to SunocoProducts Company, Hansville, S.C., a corporation of South Carolina FiledJan. 2, 1963, Ser. No. 248,917

4 Claims. (Cl. 229-45) j This application is a continuation-in-part ofapplication Serial Number 180,606, now U.S. Patent Number 3,159,519,entitled Method and Apparatus for Making Composite Oil Containers ofSpirally Wound Strips, filed Mar. 19, 1962 by Charles K. Dunlap.

This invention relates to containers and more particularly to woundmulti-ply containers for the packaging of oil and similar materials.

In the packaging of liquid materials and in particular oil, widespreaduse is made of wound libre containers suitably lined with oil imperviousmaterial so as to prevent leaking or wicking of the packaged oil. Thesecontainers are commonly referred to as composite containers and aregenerally sealed at each end with seamed on metal ends. For example,such composite containers are used widely for the packaging'of engineoil for sale to the typical motorist and are commonly provided in a onequart size. As a result of the many advantages of such compositecontainers including low cost and light Weight, they have, in manycases, replaced cans made entirely of metal.

Composite containers made today are generally wound from a plurality oflibre or paper strips together with a weather-resistant printed labelouter strip such as suitably imprinted metal foil laminated to paper andan inner strip such as metal foil laminated to paper which is imperviousto the packaged oil. All of these strips are generally spirally Woundinto a tube which is severed into uniform lengths. Such tube lengthsform container bodies having open ends subsequently closed by metaldiscs or ends and the inner metal foil liner prevents leaking or wickingof the packaged oil. A suitable seam construction is generally providedfor the inner spiral seam to prevent oil leakage or wicking. `In oneconstruction for sealing the inner spiral seam, a metal foil laminatedpaper inner strip is spirally wound with the edges of adjacentconvolutions -in abutting relationship forming a spiral seam over whichis adhesively bonded in sealing relationship by means of a thermoplasticadhesive, a spirally Wound metal foil strip.

In order to prevent leaking of oil from the container, manyconstructions and materials have been proposed for the inner wall ofsuch spirally wound containers. For instance, paper coated with asuitable impervious material such as plastic has been proposed but theproblem of leaking at the inner spiral seam has been extremely ditlicultto overcome. The use of an inner strip of a liquid impervious materialsuch as a plastic strip or a metal foil strip has been proposed but inaddition to the problem of proper adhesion, such plastic and foil stripshave either been too fragile to handle easily or if thick enough forhandling, excessively expensive. Even the laminating of metal foil topaper so as to reduce the cost of the metal foil has added materially tothe cost of such containers and much effort has been expended in anattempt to secure a suitable container lining material and constructionwhich is low in cost and which Will contain oil without leaking orwicking.

Accordingly, a primary object of this invention is to provide a new andnovel leakproof container body for the packaging of oil and similarmaterials.

Another object of this invention is to provide a new and novel leakproofwound multi-ply container body for the packaging of oil which utilizesglassine as an inner lining material.

Still another object of this invention is to provide `a new and novelleakproof, spirally Wound, multi-ply container body composedsubstantially Iof libre for the packaging of oil and which is providedwith an oil impervious inner ply of glassine having a spiral butt seamsealed by glassine.

Other objects and advantages of the invention will become apparent fromthe following description taken in connection with the accompanyingdrawings.

The objects stated above and other related objects in this invention areaccomplished by spirally Winding a plurality of strips adhesivelysecured together on an elongated mandrel having a heated section to forma spiral tube severable into uniform lengths to form container bodies.The spirally wound strip forming the inner ply for the tube is ofglassine and the glassine strip is wound with its adjacent convolutionsforming a spiral butt seam. A relatively narrow sealing strip ofglassineV coated on `one surface with a thermoplastic adhesive isspirally wound together with the inner glassine strip and the glassinesealing strip is positioned across the spiral butt seam With its coatedsurface in contact with the glassine inner strip. The heated mandrelsection activates the thermoplastic adhesive on the glassine sealingstrip and upon cooling, the glassine sealing strip is bonded by theadhesive to the glassine inner ply to seal the spiral butt seam and forman oil impervious inner barrier on the spiral tube.

`The novel features which are believed to be characteristic of theinvention are set forth with particularity in the appended claims. Theinvention itself, however, both as to its organization and method ofoperation may be best understood by reference to the followingdescription taken in conjunction with the accompanying drawings inwhich:

FIGURE l is an isometric view of an oil container formed in accordancewith the invention;

FIGURE 2 is `an enlarged axially extending sectional view of a partiallywound container taken during the manufacturing operation; and

FIGURE 3 is an enlarged sectional view taken substantially along line3-3 of FIGURE 1 in the direction of the arrows.

As referred to inthe aforementioned patent, the container of the typeforming the subject matter of this invention is designated generally inFIGURE l by the numeral l0. Although other liquid or semi-liquidrnaterials may be packaged in the container l0, it is particularlysuitablefor the packaging of oil and similar products. Liquid orsemi-liquid materials containing water would not be generally suitablefor packaging in the container It) due to the tendency of its innerlining to deteriorate in the presence of Water and it is with referenceto the packaging of oil and similar materials that the container lil isadapted. It should be understood that the container ltl is a containerof the type which, as shown, is sealed at both ends and it is thepurpose of the invention to provide a tubular body which, when suitablyclosed ateach end with metal ends or the like, forms the container 10.

The container 1t? comprises a spirally wound, multiply body il having anexterior spiral seam 12 which body is formed from a plurality of stripsincluding fibre or paper strips which, as will be described hereinafter,are adhesively secured together in overlapping relationship. Prior tofilling, the body 11 is first sealed at one end with a suitable circulardisc or end i3 formed from metal or the like and after filling with oilis sealed at its other end with an end i4 similarly formed of metal toprovide a completely closed container.

As described in the aforementioned patent, spiral tube winding apparatusis provided for forming the container body of the invention whichincludes a Winding mandrel 21 on which is wound a spiral tube which tubeis subsequently severed into uniform lengths to form container bodies11.

As specifically illustrative of the invention, the body 11 of thecontainer 10 is wound from a plurality of strips of material whichinclude an inner strip 33 of glassine unwound from a supply roll.Glassine, as is well known, is a thin transparent paper made usuallyfrom suliite pulp by prolonged beating and super calendering.Commercially available glassine is substantially oil impervious butafter incorporation in the container body of the invention and processedin accordance with the novel met-bod of the invention is virtuallycompletely impervious to oil.

The glassine strip 33 is spirally Wound on a heated section of a windingmandrel 21 with the adjacent convolutions of the glassine strip forminga spiral butt seam 36. At the same time, a relatively narrow sealingstrip 37 of glassine having a thermoplastic adhesive coating 38 on onesurface is unwound from a supply roll and wound on the mandrel 21 underthe inner ply formed by the glassine strip 33. The glassine sealingstrip 37 is arranged with its thermoplastic adhesive coating 38 incontact with the inner surface of the glassine inner strip 33 and thesealing strip 37 is positioned across the spiral butt seam 36. Theintimate Contact between the glassine sealing strip 37 and the heatedmandrel section softens its thermoplastic coating 38 which, uponcooling, bonds the glassine sealing strip 37 permanently to the glassineinner ply 33 to completely seat the butt seam 36 The strips forming thecontainer body 11 also preferably includes intermediate paper strips 41,42 which are spirally wound on the mandrel 21 over the glassine innerply 33. Paper strip 41 is advanced through an adhesive applicator ofconventional construction so that the strip 41 is immersed in adhesivefor coating the strip on both sides. Thus when the strip 41 is wound onthe mandrel 21, the

lglassine strip 33 and paper strips 41, 42 are securely adheredtogether.

A top ply 47, which is preferably a paper strip having a printed foillabel secured thereto is spirally wound together with strips 33, 37, 41,42 to form an outer weatherresistant ply for the spiral tube. Adhesiveis applied to the underside of the strip 47 by means of a glueapplicator -of conventional construction. The resulting tube istherefore a multi-ply, spirally wound, tubular structure which, whensevered into uniform lengths, provides the bodies 11 for the oilcontainers 10. After filling, the container is sealed with the metalends 13, 14 to form a leakproof container with oil packaged therein.

With the novel arrangement of the invention, there has been provided abody for a tubular container in which products such as oil may bepackaged without leaking or `wicking of the packaged oil. With the useof glassine for `the inner ply of the container body, the entire bodycan be formed of inexpensive, readily available fibrous materialalthough, in the preferred embodiment, a printed foil it will beunderstood by those skilled in the art that various changes andmodiiications may be made therein without departing from the inventionand, therefore, it is the aim of the appended claims to cover all suchchanges and modifications as fall within the true spirit and scope ofthe invention.

Having thusdescribed the invention, what is claimed 1. A container bodyfor the packaging of oil and the like comprising, in combination, aplurality of spirally wound strips adhesively secured together inoverlapping relationship to form a container body, said plurality ofstrips including an inner strip of oil impervious glassine lspirallywound to form an inner ply for said container body with adjacentconvolutions forming an inner spiral seam, a relatively narrow, spirallywound strip of oil impervious glassine extending across said innerspiral seam and secured to said glassine inner ply with a thermoplasticadhesive, said narrow glassine strip thereby sealing said inner spiralseam and forming with said glassine inner ply and oil impervious barrierfor said container body.

2.' A container body for the packaging of oil and the like comprising,in combination, a plurality of spirally Wound strips adhesively securedtogether in overlapping relationship to form a container body, saidplurality of strips including an inner strip of oil impervious glassinespirally wound to form an inner ply for said container body and withadjacent convolutions arranged substantially in abutting relationship toform an inner spiral butt seam, a relatively narrow, spirally woundstrip of oil impervious glassine extending across said inner spiral buttseam and secured to said glassine inner ply with a thermoplasticadhesive, said narrow glassine strip thereby sealing said inner spiralbutt seam and forming with said glassine inner ply an oil imperviousbarrier for said container body.

3. A container body for the packaging of oil and the like comprising, incombination, a plurality of spirally wound strips adhesively securedtogether in overlapping relationship to form a container body, saidplurality of strips including at least one paper strip and an innerstrip of oil impervious glassine spirally wound to form an inner ply forsaid container body and with adjacent convolutions arrangedsubstantially in abutting relationship to form an inner spiral buttseam, a relatively narrow, spirally wound strip of oil imperviousglassine extending across said inner spiral butt seam and secured tosaid glassine inner ply with a thermoplastic adhesive, said narrowglassine strip thereby sealing said inner spiral butt seam and formingwith said glassine inner ply an oil impervious barrier for saidcontainer body.

4. A container body in accordance with claim 3 including a metal discpositioned in closing relationship on each end of said body to form acontainer.V

References Cited by the Examiner UNITED STATES PATENTS 1,944,970 1/ 34Dieiienbach 93-80 v 2,130,355 9/38 Magill 156-190 2,349,730 5/ 44Horning 229-45 2,555,380 6/51 Stuart et al 229-4.5 2,623,680 12/ 52Wilcox 229-7-45 2,623,681 12/52 Wilcox 229-45 2,943,540 7/60 McBain156-190 JOSEPH R. LECLAIR, Primary Examiner.

FRANKLIN T. GARRETT, Examiner.

1. A CONTAINER BODY FOR THE PACKAGING OF OIL AND THE LIKE COMPRISING, INCOMBINATION, A PLURALITY OF SPIRALLY WOUND STRIPS ADHESIVELY SECUREDTOGETHER IN OVERLAPPING RELATIONSHIP TO FORM A CONTAINER BODY, SAIDPLURALITY OF STRIPS INCLUDING AN INNER STRIP OF OIL IMPERVIOUS GLASSINESPIRALLY WOUND TO FORM AN INNER PLY FOR SAID CONTAINER BODY WITHADJACENT CONVOLUTIONS FORMING AN INNER SPIRAL SEAM, A RELATIVELY NARROW,SPIRALLY WOPUND STRIP OF OIL IMPERVIOUS GLASSINE EXTENDING ACROSS SAIDINNER SPIRAL SEAM AND SECURED TO SAID GLASSINE INNER PLY WITH ATHERMOPLASTIC ADHESIVE, SAID NARROW GLASSINE STRIP THEREBY SEALING SAIDINNER SPIRAL SEAM AND FORMING WITH SAID GLASSINE INNER PLY AND OILIMPERVIOUS BARRIER FOR SAID CONTAINER BODY.